Need a simple calibrator and tester for quickly assessing the capability of a new or newly modified/repaired 3D printer? Instead of several hours typical of other complex testers, this one provides in about 1 hour or less (depending on speed and layer thickness) the following:

1. X, Y, Z dimensions check
2. Stringing and oozing checks across 5 pillars allowing X, Y and diagonal X-Y optimization
3. Overhang test
4. Bridging test across about 5 to 7 mm at the edge of overhang
5. Structural quality assessment for side pillars with cross-section < 2mm x 2mm

I found this to be a relatively quick and reliable tester for 0.15 to 0.35 mm layers. For smaller structures and higher accuracy testing, I use another quick tester which can be found here: https://www.thingiverse.com/thing:2871083